Mangrove forest soil sampler and mangrove forest soil combined sampling device

Abstract

The invention belongs to the technical field of soil sampling equipment, and discloses a mangrove forest soil sampler and a mangrove forest soil combined sampling device.The mangrove forest soil sampler comprises a drilling outer barrel and a sampling inner barrel, the drilling outer barrel is connected with a connecting ring, an outer barrel connecting part and a spiral drilling blade, and the connecting ring is connected with a drilling handle; the outer drilling cylinder is provided with a drilling part and an outer cylinder sampling port, and the inner sampling cylinder is provided with an inner cylinder connecting cap and an inner cylinder sampling port; the combined sampling device comprises a sampler, a base plate and a positioning disc, the base plate is connected with a positioning assembly and a gradienter, the base plate is provided with a sliding groove and a through groove, the positioning disc is connected with a sliding block, and the sliding block is connected with a locking bolt. After the sampler reaches a specified depth, the sampling port of the inner cylinder is communicated with the sampling port of the outer cylinder, the depth of an obtained soil sample is determined, and the accuracy and the reliability of the soil sample are good; multi-point and multi-depth sampling is realized by utilizing the combined sampling device, and the sampling efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling equipment, in particular to a mangrove soil sampler and a mangrove soil combined sampling device. Background Art

[0002] As a unique ecosystem growing in the intertidal zone of tropical and subtropical regions, mangroves are an important part of nature with their high biodiversity and productivity. The soil where mangroves grow is rich in organic carbon, which is a key link in maintaining ecological balance and material circulation. In addition, as a hub for the exchange of nutrients between land and sea, the organic carbon input of mangrove wetlands in their sediments plays an irreplaceable role in the function of the entire ecosystem. However, mangroves have a special growth environment, mostly located in high-salinity, highly acidic fertile sea mud, and are periodically soaked by tides. Therefore, accurate analysis of the content of various components in mangrove soil is of great significance for evaluating soil quality, revealing the adaptation strategies of mangrove plants to the environment, the driving mechanisms in the degradation process, and providing a scientific basis for the restoration and protection strategies of degraded mangrove ecosystems. In the study of mangrove ecosystems, accurately obtaining and analyzing the content of soil components at different depths is the basis for understanding its ecological processes, evaluating ecological health status, and formulating protection and restoration strategies.

[0003] At present, the sampling of mangrove soil mainly relies on the PVC tube sampling method, which is time-consuming and labor-intensive, especially when the study area is wide and the sampling points are dense, and the efficiency is low. Moreover, the opening design at the bottom of the PVC tube is prone to soil sample leakage in the mangrove soil with high water content, and the depth of the soil sample obtained by sampling is uncertain, which not only affects the integrity and representativeness of the soil sample, but also reduces the accuracy and reliability of subsequent ecological chemometric data analysis. Summary of the invention

[0004] The present invention is intended to provide a mangrove soil sampler and a mangrove soil combined sampling device. The sampler includes a drilling outer cylinder and a sampling inner cylinder. When sampling, the inner cylinder sampling port is connected with the outer cylinder sampling port only after reaching a specified depth. The depth of the sampled soil sample is determined, and the accuracy and reliability of the soil sample are good. After the sampling is completed, the inner cylinder sampling port and the outer cylinder sampling port are staggered to close them to avoid leakage of the soil sample. The combined sampling device includes a plurality of samplers and a base plate. The base plate is first fixed to a specified position using a positioning assembly, and then a plurality of samplers are used to perform multi-point and multi-depth sampling, and the sampling efficiency is high. The problem in the background technology is solved.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A mangrove soil sampler comprises a drilling outer cylinder and a sampling inner cylinder, wherein the inner diameter of the drilling outer cylinder is equal to the outer diameter of the sampling inner cylinder; the upper part of the drilling outer cylinder is connected with a connecting ring, the connecting ring is connected with a drilling handle, the lower part of the drilling outer cylinder is provided with a drilling part and an outer cylinder sampling port, the drilling part is in a pointed wedge shape; the sampling inner cylinder is provided with an inner cylinder sampling port which is arranged in coordination with the outer cylinder sampling port; when the inner cylinder sampling port is connected with the outer cylinder sampling port, soil is sampled.

[0007] Furthermore, the drilling part is fixedly connected with a spiral drilling blade, and the outer cylinder sampling port is arranged on the inner side of the spiral drilling blade.

[0008] Furthermore, the caliber of the inner cylinder sampling port is equal to the caliber of the outer cylinder sampling port.

[0009] Furthermore, an outer cylinder connecting portion is provided on the upper part of the drilling outer cylinder, the outer cylinder connecting portion is arranged on the upper side of the connecting ring, and the outer cylinder connecting portion is provided with an external thread; an inner cylinder connecting cap is provided on the upper part of the sampling inner cylinder, the inner cylinder connecting cap is provided with an internal thread, and the inner cylinder connecting cap is connected to the outer cylinder connecting portion through threads.

[0010] Furthermore, the drilling handle includes a first externally threaded rod and a first internally threaded barrel, the first externally threaded rod is rotatably connected to the connecting ring, and the first internally threaded barrel is connected to the first externally threaded rod via threads.

[0011] A combined mangrove soil sampling device includes several of the above-mentioned soil samplers, a base plate and several positioning plates, wherein the positioning plates are slidably connected to the base plate, the base plate is connected to several positioning components for positioning the base plate, a through groove is provided on the upper side of the base plate, and the soil sampler samples the soil after passing through the positioning plate and the through groove in sequence.

[0012] Further, the positioning assembly includes a positioning box and a second internally threaded cylinder, the positioning box is fixedly connected to the base plate, the positioning box is rotatably connected to an active bevel gear and a second externally threaded rod, the active bevel gear is fixedly connected to an adjustment handle arranged on the outside of the positioning box, and the second externally threaded rod is fixedly connected to a driven bevel gear meshing with the active bevel gear; the upper part of the second internally threaded cylinder is connected to the lower part of the second externally threaded rod by a thread, and the second internally threaded cylinder is slidably penetrated into the positioning box.

[0013] Furthermore, a pointed wedge portion is provided at the lower portion of the second internally threaded cylinder.

[0014] Furthermore, a level meter that is arranged in coordination with a plurality of the positioning components is connected to the upper side of the substrate, and the level meter is arranged directly above the corresponding positioning component.

[0015] Furthermore, the front and rear sides of the base plate are provided with sliding grooves, the positioning plate is fixedly connected with a slider, the slider is slidably connected to the sliding groove, and the slider is threadedly connected with a locking bolt that fixes it to the base plate.

[0016] The principle and beneficial effects of the technical solution are:

[0017] 1. A mangrove soil sampler provided by the present invention has a drilling handle connected to the upper part of the drilling outer cylinder by a connecting ring, and a drilling part in the shape of a pointed wedge is arranged at the lower part, and the drilling outer cylinder is inserted into the deep soil by using the drilling handle and the drilling part; the outer diameter of the sampling inner cylinder is equal to the inner diameter of the drilling outer cylinder, so that the drilling outer cylinder is sleeved on the outer side of the sampling inner cylinder, so that the sampling inner cylinder can be drilled into the deep soil together with the drilling outer cylinder, and after reaching the specified depth, the inner cylinder sampling port of the sampling inner cylinder is connected with the outer cylinder sampling port of the drilling outer cylinder, and the soil is sampled to obtain the soil sample of the depth, and the accuracy and reliability of the subsequent data analysis are good; after the soil sampling of a specific depth is completed, the sampling inner cylinder is rotated so that the inner cylinder sampling port and the outer cylinder sampling port are staggered to close them, so as to avoid leakage of the soil sample or cross-mixing with the soil at different depths, and ensure the integrity and representativeness of the soil sample;

[0018] 2. A mangrove soil sampler provided by the present invention has a spiral drilling blade fixedly connected to the drilling part to facilitate the insertion of the drilling outer cylinder into the deep soil; the outer cylinder sampling port is arranged on the inner side of the spiral drilling blade, and in the process of sampling the soil, the spiral drilling blade guides the soil to ensure that the soil can smoothly and orderly enter the sampling inner cylinder through the spiral drilling blade, the outer cylinder sampling port and the inner cylinder sampling port; the caliber of the inner cylinder sampling port is set to be consistent with the caliber of the outer cylinder sampling port to improve the sampling efficiency;

[0019] 3. A mangrove soil sampler provided by the present invention has an outer cylinder connecting part arranged on the upper part of the drilling outer cylinder, an inner cylinder connecting cap arranged on the upper part of the sampling inner cylinder, and the inner cylinder connecting cap and the outer cylinder connecting part are connected by threads, which not only ensures the connection relationship between the sampling inner cylinder and the drilling outer cylinder, but also facilitates the sampling inner cylinder to drill into the soil deeply with the drilling outer cylinder; by setting the position of the thread and the sampling port, the relative position relationship between the inner cylinder sampling port and the outer cylinder sampling port can also be known through the connection state of the thread, such as the thread of the connecting cap and the outer cylinder connecting part is fully connected, the inner cylinder sampling port and the outer cylinder sampling port are staggered to be closed, the thread of the connecting cap and the outer cylinder connecting part is not connected, the inner cylinder sampling port and the outer cylinder sampling port are connected and opened, the connecting cap is connected to the threaded part of the outer cylinder connecting part, and the inner cylinder sampling port and the outer cylinder sampling port are partially connected, so that the operator can effectively sample deep soil;

[0020] 4. A mangrove soil sampler provided by the present invention comprises a drilling handle comprising a first externally threaded rod and a first internally threaded barrel connected by threads, the first externally threaded rod is rotatably connected to a connecting ring, so that the drilling handle can be adjusted in length and use angle according to actual needs, which is convenient for different sampling personnel, sampling habits, soil environment, etc. to meet the needs of the handle; the drilling handle can also be used as a limiter, and the first internally threaded barrel is rotated to adjust the length of the drilling handle according to the required sampling depth, and its axis is parallel to the axis of the drilling outer barrel body. After drilling the drilling outer barrel downward to a specified depth, the handle is adjusted to limit the drilling outer barrel to avoid over-drilling, so as to ensure the accuracy of the sampling depth;

[0021] 5. A mangrove soil combined sampling device provided by the present invention has a positioning assembly connected to the lower side of a base plate, which is fixed at a designated position for sampling, and a through slot is provided on the upper side of the base plate, a positioning plate is slidably arranged on the upper side of the base plate, and a plurality of samplers pass through the positioning plates respectively. After sliding on the base plate and passing through the through slot, the samplers can be used to sample the soil, so that multi-sample and multi-depth sampling can be achieved, and the sampling efficiency is high;

[0022] 6. The present invention provides a combined sampling device for mangrove soil, in which the second internally threaded barrel of the positioning assembly is inserted deep into the ground surface to fix the base plate, thereby ensuring the stability of the entire sampling device during the drilling sampling process; wherein the second internally threaded barrel of the positioning assembly is connected to the second externally threaded rod through a thread, and the second externally threaded rod is connected to the adjusting handle through a bevel gear set (active bevel gear and driven bevel gear), and the active bevel gear rotates accordingly when the adjusting handle is turned, and the second internally threaded barrel moves linearly along its axial direction under the action of the driven bevel gear, the second external thread and the positioning box; therefore, the adjusting handle is turned to extend the second internally threaded barrel out of the positioning box, so as to fix the base plate, thereby ensuring the stability during the drilling sampling process; a pointed wedge portion is provided at the lower part of the second internally threaded barrel to improve the effect and efficiency of the second internally threaded barrel being inserted into the ground surface;

[0023] 7. The present invention provides a combined mangrove soil sampling device, in which a spirit level is connected to the upper side of a base plate in cooperation with a plurality of positioning components, and the spirit level is arranged just above the corresponding positioning components, and the heights of the plurality of positioning components are adjusted with the aid of the spirit level to ensure that the upper surface of the base plate is in a horizontal state. When sampling at multiple points and multiple depths, the depths of the soil samples obtained are accurate and uniform, and when performing data analysis in the later stage, the reliability of the data for comparison or control is good; slide grooves are provided on the front and rear sides of the base plate, and a positioning plate is fixedly connected to a slider, and the slider is slidably connected to the slide groove, and the slider is threadedly connected to a locking bolt that fixes it to the base plate, so that the positioning plate can be effectively fixed and accurately positioned, and the relative sliding of the base plate during the drilling sampling process is avoided, the drilling sampling has good stability, and the relative positions of the plurality of samplers are accurate, thereby ensuring the reliability of the later data analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of a mangrove soil sampler in Example 1 of the present invention;

[0025] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0026] Figure 3 This is a schematic structural diagram of a mangrove soil sampler in Example 1 of the present invention;

[0027] Figure 4 This is a schematic diagram of a drilling outer cylinder and a sampling inner cylinder of a mangrove soil sampler in Example 1 of the present invention;

[0028] Figure 5 This is a schematic structural diagram of a mangrove soil combined sampling device in Example 2 of the present invention;

[0029] Figure 6 This is a front view of a mangrove soil combined sampling device in Example 2 of the present invention;

[0030] Figure 7 for Figure 6 Cross-sectional view of the middle BB;

[0031] Figure 8 for Figure 6 Cross-sectional view of CC.

[0032] The names of the corresponding marks in the accompanying drawings are:

[0033] Drilling outer cylinder 1, drilling part 2, outer cylinder sampling port 3, outer cylinder connecting part 4, sampling inner cylinder 5, inner cylinder sampling port 6, inner cylinder connecting cap 7, connecting ring 8, first externally threaded rod 9, first internally threaded cylinder 10, base plate 11, through groove 12, slide groove 13, slider 14, locking bolt 15, positioning plate 16, level 17, positioning assembly 18, positioning box 19, active bevel gear 20, second externally threaded rod 21, driven bevel gear 22, pointed wedge part 23, second internally threaded cylinder 24. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0035] Example 1

[0036] like Figures 1 to 4As shown, a mangrove soil sampler includes a drilling outer tube 1 and a sampling inner tube 5. The upper part of the drilling outer tube 1 is connected with a connecting ring 8 and an outer tube connecting part 4. The connecting ring 8 is connected with a drilling handle. The drilling handle includes a first external threaded rod 9 and a first internal threaded tube 10. The first external threaded rod 9 is rotatably connected to the connecting ring 8. The first internal threaded tube 10 is connected to the first external threaded rod 9 through a thread. The outer tube connecting part 4 is arranged on the upper side of the connecting ring 8, and the outer tube connecting part 4 is provided with an external thread. The lower part of the drilling outer tube 1 is provided with A drilling part 2 and an outer cylinder sampling port 3, the drilling part 2 is in a pointed wedge shape, and the outer cylinder sampling port 3 is arranged on the inner side of the spiral drilling blade; an inner cylinder connecting cap 7 is arranged on the upper part of the sampling inner cylinder 5, and the inner cylinder connecting cap 7 is provided with an internal thread, and the inner cylinder connecting cap 7 is connected to the outer cylinder connecting part 4 by a thread, and an inner cylinder sampling port 6 is arranged on the lower side of the sampling inner cylinder 5 to cooperate with the outer cylinder sampling port 3, the inner diameter of the drilling outer cylinder 1 is equal to the outer diameter of the sampling inner cylinder 5, and when the inner cylinder sampling port 6 is connected with the outer cylinder sampling port 3, the soil is sampled.

[0037] The specific implementation process is as follows:

[0038] When using the sampler, first insert the sampling inner tube 5 into the inner side of the drilling outer tube 1, and rotate the sampling inner tube 5 so that the inner tube connection cap 7 is connected to the outer side of the outer tube connection part 4 through a thread, and the inner tube sampling port 6 and the outer tube sampling port 3 are staggered with each other; then rotate the first inner threaded tube 10 to adjust the length of the entire drilling handle according to the environment of the sampling location, the sampling depth and the sampler's own habits; then, abut one side of the drilling part 2 against the ground surface, and use the drilling handle to insert the drilling outer tube 1 with the sampling inner tube 5 into the ground surface Deep, after inserting to the specified depth, rotate the sampling inner cylinder 5 so that the inner cylinder sampling port 6 is connected with the outer cylinder sampling port 3; finally, rotate the drilling outer cylinder 1 again so that the soil at this location enters the inner side of the sampling inner cylinder 5 through the spiral drilling blades, the outer cylinder sampling port 3 and the inner cylinder sampling port 6, so as to realize the sampling of the soil; after the sampling is completed, rotate the sampling inner cylinder 5 again so that the inner cylinder sampling port 6 and the outer cylinder sampling port 3 are staggered with each other, and then rotate the drilling outer cylinder 1 to take it out from the surface together with the sampling inner cylinder 5, so as to complete the sampling of the soil.

[0039] Among them, the spiral drilling blade is fixedly connected to the drilling part 2, and the outer cylinder sampling port 3 is arranged on the inner side of the spiral drilling blade, which is convenient for the drilling outer cylinder 1 to be inserted deep into the soil, and the spiral drilling blade can also guide the soil to ensure that the soil can smoothly and orderly enter the sampling inner cylinder 5 through the spiral drilling blade, the outer cylinder sampling port 3 and the inner cylinder sampling port 6; the outer cylinder connecting part 4 is arranged on the upper part of the drilling outer cylinder 1, and the inner cylinder connecting cap 7 is arranged on the upper part of the sampling inner cylinder 5. The inner cylinder connecting cap 7 is connected to the outer cylinder connecting part 4 through a thread, which not only ensures the connection relationship between the sampling inner cylinder 5 and the drilling outer cylinder 1, but also facilitates the sampling inner cylinder 5 to drill deeper into the soil with the drilling outer cylinder 1; by setting the position of the thread and the sampling port, the inner cylinder sampling state can also be known through the connection state of the thread. The relative position relationship between the sample port 6 and the outer tube sampling port 3 is convenient for the operator to effectively sample deep soil; the drilling handle includes a first externally threaded rod 9 and a first internally threaded tube 10 connected by threads, and the first externally threaded rod 9 is rotatably connected to the connecting ring 8, so that the drilling handle can be adjusted in length and use angle according to actual needs, which is convenient for different sampling personnel, sampling habits, soil environment, etc. to meet the needs of the handle; the drilling handle can also be used as a limiter, and the first internally threaded tube 10 can be rotated to adjust the length of the drilling handle according to the required sampling depth, and its axis is parallel to the axis of the drilling outer tube 1. After drilling the drilling outer tube 1 downward to the specified depth, the handle is adjusted to limit the drilling outer tube 1 to avoid over-drilling.

[0040] Example 2

[0041] like Figures 5 to 8 As shown, a mangrove soil combined sampling device includes three soil samplers in Example 1, and also includes a base plate 11 and three positioning plates 16. The left and right ends of the base plate 11 are connected with two positioning components 18 and two levels 17. The positioning component 18 includes a positioning box 19 and a second internally threaded cylinder 24. The positioning box 19 is fixedly connected to the lower side of the base plate 11. The positioning box 19 is rotatably connected to an active bevel gear 20 and a second externally threaded rod 21. The active bevel gear 20 is fixedly connected to an adjustment handle arranged on the outer side of the positioning box 19. The second externally threaded rod 21 is fixedly connected to a driven bevel gear 22 that meshes with the active bevel gear 20. The upper part of the second internally threaded cylinder 24 It is connected to the lower part of the second externally threaded rod 21 through a thread, and the second internally threaded tube 24 is slidably penetrated into the positioning box 19, and a pointed wedge portion 23 is provided at the lower part of the second internally threaded tube 24. Two levels 17 are connected to the upper side of the base plate 11, and the two levels 17 are respectively arranged directly above the two positioning components 18; the front and rear sides of the base plate 11 are provided with slide grooves 13, the positioning plate 16 is fixedly connected with a slider 14, the slider 14 is slidably connected to the slide groove 13, and the slider 14 is threadedly connected with a locking bolt 15 that fixes it to the base plate 11; a through groove 12 is provided on the upper side of the base plate 11, and the soil sampler samples the soil after passing through the positioning plate 16 and the through groove 12 in turn.

[0042] The specific implementation process is as follows:

[0043] When using the combined sampling device, first use the two positioning components 18 to fix the base plate 11 at the position to be sampled, then turn the two adjustment handles respectively, and use the two levels 17 to level the upper surface of the base plate 11; then according to the actual sampling needs, slide the slider 14 along the slide groove 13 to adjust the specific position of the three positioning disks 16. After the position is determined, use the locking bolts 15 to fix and lock it to the base plate 11; finally, use the sampler to pass through the positioning disk 16 and the through slot 12 of the base plate 11 from top to bottom, and then start sampling.

[0044] Among them, by turning the adjustment handle, the second internal threaded tube 24 is extended out of the positioning box 19 and inserted into the ground surface, the substrate 11 is fixed, and the drilling sampling process is stable; a pointed wedge portion 23 is provided at the lower part of the second internal threaded tube 24 to improve the effect and efficiency of the second internal threaded tube 24 inserted into the ground surface; a level 17 is connected to the upper side of the substrate 11 and is arranged in conjunction with the positioning component 18. The sampling personnel adjust the height of the positioning component 18 with the help of the level 17 to ensure that the upper surface of the substrate 11 is in a horizontal state. When sampling at multiple points and multiple depths, the depth of the soil sample obtained is Accurate and uniform, when performing data analysis in the later stage, the reliability of the compared or contrasted data is good; a slide groove 13 is opened on the front and rear sides of the base plate 11, and the positioning plate 16 is fixedly connected to the slider 14, the slider 14 is slidably connected to the slide groove 13, and the slider 14 is threadedly connected with a locking bolt 15 that fixes it to the base plate 11, which can achieve effective fixation and accurate positioning of the positioning plate 16, and avoid the sampling tube from sliding relative to the base plate 11 during the drilling sampling process. The drilling sampling has good stability, and the relative positions of multiple samplers are accurate, ensuring the reliability of the later data analysis.

[0045] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A mangrove soil sampler, characterized in that: It comprises a drilling outer cylinder and a sampling inner cylinder, wherein the inner diameter of the drilling outer cylinder is equal to the outer diameter of the sampling inner cylinder; the upper part of the drilling outer cylinder is connected with a connecting ring, the connecting ring is connected with a drilling handle, the lower part of the drilling outer cylinder is provided with a drilling part and an outer cylinder sampling port, the drilling part is in a pointed wedge shape; the sampling inner cylinder is provided with an inner cylinder sampling port which is arranged in coordination with the outer cylinder sampling port; when the inner cylinder sampling port is connected with the outer cylinder sampling port, soil is sampled.

2. A mangrove soil sampler according to claim 1, characterized in that: The drilling part is fixedly connected with a spiral drilling blade, and the outer cylinder sampling port is arranged on the inner side of the spiral drilling blade.

3. A mangrove soil sampler according to claim 2, characterized in that: The caliber of the inner cylinder sampling port is equal to the caliber of the outer cylinder sampling port.

4. A mangrove soil sampler according to claim 3, characterized in that: An outer cylinder connecting portion is provided on the upper part of the drilling outer cylinder, the outer cylinder connecting portion is arranged on the upper side of the connecting ring, and the outer cylinder connecting portion is provided with an external thread; an inner cylinder connecting cap is provided on the upper part of the sampling inner cylinder, the inner cylinder connecting cap is provided with an internal thread, and the inner cylinder connecting cap is connected to the outer cylinder connecting portion through threads.

5. A mangrove soil sampler according to claim 4, characterized in that: The drilling handle comprises a first externally threaded rod and a first internally threaded barrel, wherein the first externally threaded rod is rotatably connected to the connecting ring, and the first internally threaded barrel is connected to the first externally threaded rod via threads.

6. A mangrove soil combined sampling device, comprising a plurality of soil samplers as claimed in claim 5, characterized in that: It also includes a base plate and a plurality of positioning plates, wherein the positioning plates are slidably connected to the base plate, the base plate is connected to a plurality of positioning components for positioning the base plate, a through slot is provided on the upper side of the base plate, and the soil sampler samples the soil after passing through the positioning plates and the through slot in sequence.

7. A mangrove soil combined sampling device according to claim 6, characterized in that: The positioning assembly includes a positioning box and a second internally threaded cylinder, the positioning box is fixedly connected to the base plate, the positioning box is rotatably connected to a driving bevel gear and a second externally threaded rod, the driving bevel gear is fixedly connected to an adjustment handle arranged on the outside of the positioning box, and the second externally threaded rod is fixedly connected to a driven bevel gear meshing with the driving bevel gear; the upper part of the second internally threaded cylinder is connected to the lower part of the second externally threaded rod by a thread, and the second internally threaded cylinder is slidably penetrated into the positioning box.

8. The mangrove soil combined sampling device according to claim 7, characterized in that: A pointed wedge portion is provided at the lower portion of the second internally threaded cylinder.

9. The mangrove soil combined sampling device according to claim 6, characterized in that: The upper side of the substrate is connected with a level meter which is matched with a plurality of the positioning components one by one, and the level meter is arranged directly above the corresponding positioning component.

10. The mangrove soil combined sampling device according to claim 6, characterized in that: The front and rear sides of the base plate are both provided with sliding grooves, the positioning plate is fixedly connected with a sliding block, the sliding block is slidably connected with the sliding groove, and the sliding block is threadedly connected with a locking bolt that is fixedly connected with the base plate.

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